Method of making shaft journals



Aprilzs, 1940. J M CLAIR 2,197,883

METHOD 0F MAKING SHAFT JOURNALS Filed Sept. 6, 1939 Patented Apr. 23, 1940 UNITED STATES 2,197,883 METHOD or MAKING smit-r JOURNALS John Morton Sinclair, Memphis, Tenn., assignor to Layne and Bowler, Incorporated,.Memphls, Tenn., a corporation of Delaware Application september s, 193s, sei-inno. 228.6041

2 Claims.

This invention relates to means and methods for anchoring a journal sleeve on a shaft.

That portion of a shaft which is journalled in a bearing is usually of less diameter than the 5 remainder of the shaft because of the necessity of additional turning and finishing whereas it is often advantageous and desirable that such portion of the shaft should be of greater diameter. It also happens often that the joumalled portion of the shaft could advantageously be made of a different material from the body of the shaft, but whether made of the same or different material, the bearing member should be so tightly secured as to have no movement l either 1ong1tudma11y or rotationauy about the shaft. This may obviously be accomplished by placing around the shaft a heated sleeve, which sleeve on cooling shrinks and tightly grips the shaft. 'I'his construction, however, is extremely 20 difficult where the sleeve is placed at any distance from the end of the shaft unless the sleeve has such great thickness that it will retain its heat while being slid to place along the shaft, the usual result with thin sleeves being that a g3 large number stick before they can be placed in correct position and it is necessary to cut them off and try again.

'I'he objects of the present invention are:

To provide an enlarged journal section on a n Shaft.

To provide means for securing and rigidly anchoring a journal sleeve on a shaft; and

To provide a method for placing and securing a journal sleeve around the shaft.

u The means and methods by which the foregoing and other objects are accomplished, and the manner of their accomplishment will readily be understood from the following specification on reference to the accompanying drawing, in

o which:

Fig. 1 is a side elevation of a portion of a shaft prepared for the reception of the journal sleeve.

Fig. 2 is a similar side elevation showing a journal sleeve being forced into position on the shaft, the sleeve being shown in section.

Fig. 3 is a side elevation showing the sleeve in place on the shaft, the sleeve being in section; and

Fig. 4 is a side elevation showing the sleeve in 50 elevation and in place with the ends swedged.

Referring now to the drawing in which the various parts are indicated by numerals;

I0 is a shaft having circumferential grooves II therearound with that portion I2 of the shaft Il which lies between the grooves knurled, the

(Cl. Ztl-149.5)

ridges of the knurling extending longitudinally along the shaft, preferably in exact parallelism with the axis of the shaft. The grooves Il preferably have a frusta-conical portion I3 converging in opposite directions from the knurled por- 5 tion I2 and terminating in relatively abrupt shoulders I4.

In preparing the shaft, grooves are turned in the shaft at such distances apart that the ends of the sleeve to be used will abut the shoulders I4 of the groove when the work is completed. 'I'hat portion of the shaft lying between the grooves is then knurled in usual and well known manner with a knurled wheel or roller having full straight cut teeth, the surface of the T5 shaft being alternately depressed and extruded, forming closely spaced ridges and grooves, the taper of the circumferential grooves continuing to the tops of the ridges formed in the knurling. If preferred the knurling Vmay be done before the circumferential grooving.

I5 is a sleeve of such material as it may be desired to use for the journal, this sleeve being of a length to provide a straight portion of desired length and in addition thereto tapered end portions. 'I'he interior diameter ofthe sleeve is made to have a sliding t on the shaft, whereby such interior diameter is less than the diameter of the shaft over the ridges, and these ridges must expand the sleeve, be compressed to their original position or be imbedded in part in the sleeve. The sleeve I5 is forced into place over the knurling I2 as by the hollow plunger I6 of a hydraulic press, the end of the shaft being placed against an abutment'l'l for such purpose. 35 As the sleeve I5 is forced in to position, it apparently in part compresses the ridges of the knurling and in part is longitudinally grooved by these ridges, anchoring the sleeve against possibility of rotational, and substantially against longio tudinal, displacement. The sleeve I5 is forced into position with its ends IS-A overlying the grooves Il and thereafter these ends are compressed by internally tapered sleeves into the grooves. After placing, the exterior surface of the sleeve is finished by turning and/or grinding to the exact outside dimensions desired.

It will be understood that it is not necessary in all cases to groove the shaft and compress the ends of the sleeve in such groove, but such com- 5o pression and the tapering resulting is advantageous in cases such as in deep well pumps where the shaft is lowered through bearings already in place and the taper of the journals guide them into place in the bearings.

In the instant construction in which these sleeves are used both the shaft and sleeve are of stainless steeLbut it will be understood that they may be of dissimilar metals, selected as may be most advantageous to meet conditions which may exist or arise.

I claim:

1. The method of forming a shaft Journal, which includes forming extruded ridges around said shaft, said ridges extending longitudinally along the shaft and the end portions thereof converging toward said shaft, forming shallow circumferential grooves at the opposite ends of said knurling, said grooves each having a bottom converging away' from said knurling and terminating in an abrupt shoulder; forcing a sleeve, having a sliding nt with said shaft and of length to overlie said ridges and said grooves from aromas substantially ush with said shaft, whereby to 10 provide guiding approach portions to said journal.

2. The method of forming a shaft journal as set out in claim 1 which includes finishing the exterior of said sleeve substantially concentric 16 with said shaft.

JOHN MORTON SINCLAIR. 

